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Topic: Bentley Subglacial Trench

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	JS Online: History's ice hounds
		Professor emeritus at the University of Wisconsin-Madison, Bentley is a glaciologist and a geophysicist.
		Bentley was chosen to go by famed Columbia University geophysicist Frank Press, whose office happened to be across the hall from his.
		Bentley, Giovinetto and a handful of colleagues followed the trail left by a military crew, who placed empty fuel drums every three to five miles, which made a line of radar reflectors for aircraft.
	www.jsonline.com /news/gen/jan01/bentley08010701.asp (2176 words)

	Behrendt, J., et al., Aeromagnetic Evidence for a Volcanic Caldera(?) Complex Beneath the Divide of the West Antarctic ...
		Almost certainly the shallow subglacial sources of very high-amplitude anomalies which comprise the circular structure (Figure 2) are volcanic whether or not they mark the edge of a caldera.
		Profile Y, which crosses the caldera anomaly pattern from the BST at the south to the SR at the north, shows no obvious correlation of the magnetic field with topography with the exception of the source of anomaly C (Figures 3 and 4).
		The circular pattern is obviously not directly correlated with the SR as confirmed by examination of a number of orthogonal RIS profiles crossing the circular magnetic anomaly pattern including the peaks of the high amplitude anomalies A, X, and Z in Figure 2.
	woodshole.er.usgs.gov /epubs/publications/behrendt1998 (2276 words)

	Extreme points of Antarctica - Wikipedia, the free encyclopedia
		The lowest point in Antarctica is within the Bentley Subglacial Trench, which reaches 2,555 meters below sea level.
		Vostok is the most isolated research base on the continent (located at 77° S 105° E), and it is situated over the southernmost lake in the world, Lake Vostok, a subglacial lake 4,000 meters (13,000 feet) under the surface of the ice where the station sits.
		Antarctica has the world's lowest rainfall average (Zero at the Geographic South Pole) and thus is the world's driest continent.
	en.wikipedia.org /wiki/Extreme_points_of_Antarctica (537 words)

	Geophysical Constraints on the Tectonic Structure beneath the West Antarctic Ice (Site not responding. Last check: 2007-11-02)
		The Whitmore Mountains crustal block, a segment of transitional crust between the Whitmore Mountains and the Bentley Subglacial Trench, and a unit of stretched crust towards the rift center.
		The distinct changes in Bouguer gravity from the transitional crust, the Bentley Subglacial Trench, and the stretched crust possibly represent the differential crustal extension during the Mesozoic.
		The influence of rifting for the crustal evolution seems to be weaker in the region between Marie Byrd Land and the Whitmore Mountains than in the Ross Sea.
	igloo.gsfc.nasa.gov /wais/pastmeetings/abstracts00/Studinger2.htm (289 words)

	Subglacial Sediments: A Regional Geological Template for Ice Flow in West (Site not responding. Last check: 2007-11-02)
		We estimated the distribution of marine sediments by isostatically rebounding the present-day subglacial topography.
		The paleo-shoreline is linked to the lateral margin of ice flow along the edge of the Bentley Subglacial Trench and the onset of several small tributaries of ice streams B and C. Fault-bounded basins are consistently linked with the lateral margins of ice streams while the correlation of basins to onset regions remains poorly constrained.
		In contrast, the inland migration of the onsets of ice streams B and C1 towards the ice divide outside the region covered by marine or rift sediments is unlikely.
	igloo.gsfc.nasa.gov /wais/pastmeetings/abstracts00/Studinger3.htm (296 words)

	Composition
		Because of its thick ice cover, it is the highest of all continents, with an average elevation of about 2,300 m.
		The highest point on the continent is Vinson Massif (5,140 m); the lowest point appears to be the Bentley Subglacial Trench (2,499 m below sea level) in West Antarctica.
		This trench is covered with more than 3,000 m of ice and snow.
	www.rochedalss.eq.edu.au /rdale/composition.htm (273 words)

	List of places on land with elevations below sea level - Wikipedia, the free encyclopedia
		This list is incomplete; you can help by expanding it.
		Deeper and larger than any of the trenches in the list above is the Bentley Subglacial Trench (2,540 m) in Antarctica.
		It is subglacial, meaning that it is permanently covered by the largest ice cap in the world.
	en.wikipedia.org /wiki/List_of_places_on_land_with_elevations_below_sea_level (148 words)

	AGDC PI Data Sets: Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica (D.D. Blankenship ...
		For the surface topography the contour interval is 500 m.
		The subglacial topography is represented by a 1000 m contour interval with shaded topography below -1000 m a.s.l.
		The star indicates the location of possible active subglacial volcanism (Blankenship et al., 1993).
	nsidc.org /data/docs/agdc/nsidc0099_blankenship/waismap.html (189 words)

	subglacial - OneLook Dictionary Search
		Subglacial : Online Plain Text English Dictionary [home, info]
		) Pertaining or belonging to the under side of a glacier; being beneath a glacier; as, subglacial streams.
		Phrases that include subglacial: bentley subglacial trench, subglacial lake
	www.onelook.com /?w=subglacial (167 words)

	[No title] (Site not responding. Last check: 2007-11-02)
		Title : Broadband seismic imaging of lithospheric structure: Application to the Transantarctic Mountain Front and the Bentley Subglacial Trench Abstract : This award is in support of the Seismic Experiment-Ross Ice Shelf (SERIS), a seismic study of the plate boundary between East Antarctica and the Ross Embayment.
		The first year involves acquisition of a 150-km-long multichannel seismic reflection line starting on the Ross ice shelf and entering the Transantarctic Mountains front through one of the outlet glaciers.
		The experiment is designed to serve as a prototype for large-scale seismic experiments in the interior of Antarctica in the next decade.
	www.cs.utexas.edu /users/yguan/NSFAbstracts/Abstracts/O_D/OPP.O_D.a8916852.txt (213 words)

	Lesson C3: Elevation and Temperature (Site not responding. Last check: 2007-11-02)
		Students should be able to calculate the temperature estimate however in both cases their calculation will not be equal to the real values for either Mt. Everest or the Bentley Subglacial Trench.
		The reason for this is that they are both located at different latitudes which has a significant effect on their temperatures.
		Lowest Elevation (not under seawater): The Bentley Subglacial Trench located in Antarctica has the world's lowest elevation not under seawater at -2555m (although the trench is covered by approximately 3000m of snow and ice).
	www.k12science.org /curriculum/weatherproj2/en/lessonC3.shtml (1741 words)

	WAISCORES Ice Core Site Selection
		These new data show that the "sinuous ridge" identified in the SPRI folio is in fact bisected by a trench that connects to the Bentley Subglacial Trench (image down right).
		The saddle west of the prominent dome overlies this trench, while the dome itself overlies the mountainous terrain adjacent to this trench.
		In general, the base of the mountains is at -1000 to -1500 meters; the bed is rugged in regions above approximately -1000 meters, whereas the bed is smooth in regions with topography below about -1500 meters.
	www.ig.utexas.edu /research/projects/waiscores/index.htm (1914 words)

	[No title]
		According to my souce, the lowest dry point in the world is the Bentley Subglacial Trench in Antartica, which is -2540m (-8333 feet), or 2540 meters below sea level.
		Death Valley, by comparison, is only -86m (-282 feet.) The glacier above it is also the deepest ice anywhere in the world.
		Happy, but not quite satisfied, I wanted to know what the lowest point in the world was, under sea water or other wise.
	www.tursi.com /blog/2004_08_22_pizzapizza_archive.html (608 words)

	Looking For a Map of Asia?
		It is home to the highest point on Earth, Mount Everest (Nepal, Tibet), at 29,032 feet.
		The lowest point, the Dead Sea (Israel, Jordan), is 1348 feet below sea level and is the second-lowest point on all the continents (the lowest point is 8,327 feet below sea level - the Bentley Subglacial Trench in Antarctica).
		Asia is more a geographic term than a separate continent as it is the eastern 80% of the giant Eurasian landmass.
	www.maps-gps-info.com /mp-as.html (382 words)

	World 2003 - Flags, Maps, Economy, Geography, Climate, Natural Resources, Current Issues, International Agreements, ...
		Terrain: the greatest ocean depth is the Mariana Trench at 10,924 m in the Pacific Ocean
		Elevation extremes: lowest point: Bentley Subglacial Trench -2,540 m
		note: in the oceanic realm, Challenger Deep in the Mariana Trench is the lowest point, lying -10,924 m below the surface of the Pacific Ocean
	www.theodora.com /wfb2003/world/world_geography.html (307 words)

	NOVA Online \| Warnings from the Ice \| Antarctic Almanac
		The Transantarctic Mountain range, which separates East and West Antarctica, is one of the world's great mountain ranges, stretching a full 3,000 miles--the width of the continental U.S. Mount Vinson, Antarctica's highest mountain at 16,600 feet, was discovered only in 1958 by U.S. Navy Aircraft.
		The lowest point on the continent is the Bentley Subglacial Trench, which is 8,325 feet below sea level.
		Annual mean temperature over the elevated central plateau is between -58°F and -76°F. The lowest temperature ever recorded was measured at the Russian Vostok station in 1983: -129°F
	www.pbs.org /wgbh/nova/warnings/almanac.html (683 words)

	Arizona Daily Wildcat
		The surface area of Antarctica is 14 million kilometers.
		Its lowest point is the Bentley Subglacial Trench at 2,555 meters below sea level.
		The lowest known land point in Antarctica is hidden in the Bentley Subglacial Trench; at its surface, it is the deepest ice yet discovered and the world's lowest elevation not under seawater, according to the CIA World Factbook.
	wildcat.arizona.edu /home/index.cfm?event=displayArticle&ustory_id=8c21f2eb-1cb7-4fb0-bc73-d9cd9d701244 (461 words)

	Dead Sea - Facts, Information, and Encyclopedia Reference article
		Other extremely deep points on the earth's surface
		The deepest point on the earth's crust is the Mariana Trench, a submarine trench in the western Pacific Ocean.
		There are ice-covered depressions on the continent of Antarctica that are deeper than the Dead Sea (for example, the Bentley Subglacial Trench).
	www.startsurfing.com /encyclopedia/d/e/a/Dead_Sea_b7ec.html (2516 words)

	c41a-0294 in fm06 (Site not responding. Last check: 2007-11-02)
		An additional indicator of basal properties, the basal roughness of ice sheets, may be an indicator of crustal geology and glacial modification, as well as a controlling parameter on ice dynamics and subglacial hydrology. For the Siple Coast ice streams, Fourier analysis of > 5 kilometer morphology (Siegert et al.
		On the Greenland Ice Sheet, the fraction of surface melt that moves downslope varies from zero at the top of the percolation facies to one near and below the equilibrium line altitude (ELA), and is important for determination of the surface mass balance of the ice sheet.
		Downslope meltwater movement is also a source for surface lakes and slush basins, and it is thought that these lakes and their associated hydraulic network are one source of englacial and subglacial water, which may cause acceleration of the ice sheet.
	www.agu.org /cgi-bin/SFgate/SFgate?&listenv=table&multiple=1&range=1&directget=1&application=fm06&database=/data/epubs/wais/indexes/fm06/fm06&maxhits=200&="C41A-0294" (12058 words)

	EARTH FACTS
		Deepest place in the Ocean is Marianas Trench in Marianas Islands, the bottom is 35,813 ft or about 7 miles and is called Challenger Deep.
		Ozone depletion earlier was shown to harm one-celled Antarctic marine plants; in 2002, significant areas of ice shelves disintegrated in response to regional warming
		Lowest point is Bentley Subglacial Trench at - 8,382.54593 feet.
	www.g-kexoticfarms.com /earth_facts.htm (3882 words)

	Antarctica \| Land of Extremes \| coldest place
		Many, many fascinating things have been discovered in the Antarctic that have challenged some of our most basic ideas about what life on earth means.
		The lowest point on earth is located in the basin of the Bentley Subglacial Trench.
		At -2,555 meters (8,325 feet) below sea level it is the world's lowest elevation not under seawater.
	extremescience.com /ThickestIce.htm (1172 words)

	Lowest Land Point on Earth
		Turns out that the lowest known land point is hidden in the Bentley Subglacial Trench in Antartica.
		It is the deepest ice yet discovered and the world’s lowest elevation not under seawater.
		Note: the lowest undersea point is the Pacific Ocean’s Marianas Trench.
	thebullspeaks.com /2006/07/04/lowest-land-point-on-earth (532 words)

	World Facts and Figures - Elevation Extremes by Country/Area
		note: the lowest known land point in Antarctica is hidden in the Bentley Subglacial Trench; at its surface is the deepest ice yet discovered and the world's lowest elevation not under sea water
		Milwaukee Deep in the Puerto Rico Trench -8,605 m
		Challenger Deep in the Mariana Trench -10,924 m
	www.worldfactsandfigures.com /elevation_extremes.php (241 words)

	world records - Elevation extremes - lowest point - Akrotiri
		: Challenger Deep in the Mariana Trench -10,924 m
		: Milwaukee Deep in the Puerto Rico Trench -8,605 m
		: -7,235 m at the southern end of the South Sandwich Trench
	www.exxun.com /enmp/wr_elevation_extrm_lm_1.html (529 words)

	Antarctica
		The ice-free parts of Antarctica include southern Victoria Land, Wilkes Land, the Antarctic Peninsula area, and parts of Ross Island on McMurdo Sound.
		The lowest point on Antarctica is the Bentley Subglacial Trench which is 2555 metres below sea level and it contains the deepest ice yet discovered and it is
		Approximate Pages = 4 (250 words per page double spaced)
	www.radessays.com /viewpaper/24171/Antarctica.html (272 words)

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